Mozilla/mozilla/intl/uconv/src/nsMacCharset.cpp

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 * License.
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 * The Original Code is Mozilla Communicator client code.
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#include "nsIPlatformCharset.h"
#include "pratom.h"
#include "nsURLProperties.h"
#include <Script.h>
#include "nsUConvDll.h"
#include "nsCOMPtr.h"
#include "nsIComponentManager.h"
#include "nsIMacLocale.h"
#include "nsLocaleCID.h"
#include "nsReadableUtils.h"
#include "nsPlatformCharset.h"

static nsURLProperties *gInfo = nsnull;
static PRInt32 gCnt = 0;

NS_IMPL_ISUPPORTS1(nsPlatformCharset, nsIPlatformCharset);

nsPlatformCharset::nsPlatformCharset()
{
  NS_INIT_REFCNT();
  PR_AtomicIncrement(&gCnt);
}
nsPlatformCharset::~nsPlatformCharset()
{
  PR_AtomicDecrement(&gCnt);
  if((0 == gCnt) && (nsnull != gInfo)) {
  	delete gInfo;
  	gInfo = nsnull;
  }
}

nsresult nsPlatformCharset::InitInfo()
{  
  // load the .property file if necessary
  if (gInfo == nsnull) {
    nsURLProperties *info = new nsURLProperties( NS_LITERAL_STRING("resource:/res/maccharset.properties") );
    NS_ASSERTION(info , "cannot open properties file");
    NS_ENSURE_TRUE(info, NS_ERROR_FAILURE);
    gInfo = info;
  }

  return NS_OK;
}

nsresult nsPlatformCharset::MapToCharset(short script, short region, nsAWritableString& outCharset)
{
  switch (region) {
    case verUS:
    case verFrance:
    case verGermany:
      outCharset.Assign(NS_LITERAL_STRING("x-mac-roman"));
      return NS_OK;
    case verJapan:
      outCharset.Assign(NS_LITERAL_STRING("Shift_JIS"));
      return NS_OK;
  }

  // ensure the .property file is loaded
  nsresult rv = InitInfo();
  NS_ENSURE_SUCCESS(rv, rv);

  // try mapping from region then from script
  nsAutoString key(NS_LITERAL_STRING("region."));
  key.AppendInt(region, 10);

  rv = gInfo->Get(key, outCharset);
  if (NS_FAILED(rv)) {
    key.Assign(NS_LITERAL_STRING("script."));
    key.AppendInt(script, 10);
    rv = gInfo->Get(key, outCharset);
    // not found in the .property file, assign x-mac-roman
    if (NS_FAILED(rv)) { 
      outCharset.Assign(NS_LITERAL_STRING("x-mac-roman"));
    }
  }
  
  return NS_OK;
}

NS_IMETHODIMP 
nsPlatformCharset::GetCharset(nsPlatformCharsetSel selector, nsAWritableString& oResult)
{
  if (mCharset.IsEmpty()) {
    nsresult rv = MapToCharset((short)(0x0000FFFF & ::GetScriptManagerVariable(smSysScript)), 
                               (short)(0x0000FFFF & ::GetScriptManagerVariable(smRegionCode)), 
                               mCharset);
    NS_ENSURE_SUCCESS(rv, rv);
  }
  
   oResult = mCharset; 
   return NS_OK;
}

NS_IMETHODIMP 
nsPlatformCharset::GetDefaultCharsetForLocale(const PRUnichar* localeName, PRUnichar** _retValue)
{
  nsCOMPtr<nsIMacLocale>	pMacLocale;
  nsAutoString localeAsString(localeName), charset(NS_LITERAL_STRING("x-mac-roman"));
  short script, language, region;
	
  nsresult rv;
  pMacLocale = do_CreateInstance(NS_MACLOCALE_CONTRACTID, &rv);
  if (NS_SUCCEEDED(rv)) {
    rv = pMacLocale->GetPlatformLocale(&localeAsString, &script, &language, &region);
    if (NS_SUCCEEDED(rv)) {
      rv = MapToCharset(script, region, charset);
    }
  }
  *_retValue = ToNewUnicode(charset);
  NS_ENSURE_TRUE(*_retValue, NS_ERROR_OUT_OF_MEMORY);
  
  return rv;
}

NS_IMETHODIMP 
nsPlatformCharset::Init()
{
  return NS_OK;
}

nsresult 
nsPlatformCharset::MapToCharset(nsString& inANSICodePage, nsAWritableString& outCharset)
{
  return NS_OK;
}

nsresult
nsPlatformCharset::InitGetCharset(nsAWritableString &oString)
{
  return NS_OK;
}

nsresult
nsPlatformCharset::ConvertLocaleToCharsetUsingDeprecatedConfig(nsAutoString& locale, nsAWritableString& oResult)
{
  return NS_OK;
}

nsresult
nsPlatformCharset::VerifyCharset(nsString &aCharset)
{
  return NS_OK;
}